27661156 has 6 divisors (see below), whose sum is σ = 48407030. Its totient is φ = 13830576.

The previous prime is 27661141. The next prime is 27661171. The reversal of 27661156 is 65116672.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (27661141) and next prime (27661171).

It can be written as a sum of positive squares in only one way, i.e., 17926756 + 9734400 = 4234^2 + 3120^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3457641 + ... + 3457648.

Almost surely, 2^27661156 is an apocalyptic number.

It is an amenable number.

27661156 is a deficient number, since it is larger than the sum of its proper divisors (20745874).

27661156 is a wasteful number, since it uses less digits than its factorization.

27661156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6915293 (or 6915291 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 27661156 is about 5259.3874168006. The cubic root of 27661156 is about 302.4290059474.

The spelling of 27661156 in words is "twenty-seven million, six hundred sixty-one thousand, one hundred fifty-six".